WHAT TERM IS USED TO INDICATE A CHARACTERISTIC THAT IS SHARED AND INHERITED FROM A COMMON ANCESTOR?he Cambrian Explosion provided a wealth of fossil remains for scientists to uncover. Many of the animals from this time period had tough skins or shells.
WHAT TERM IS USED TO INDICATE A CHARACTERISTIC THAT IS SHARED AND INHERITED FROM A COMMON ANCESTOR?he Cambrian Explosion provided a wealth of fossil remains for scientists to uncover. Many of the animals from this time period had tough skins or shells.
Of the following, which kingdom contains the most diversity in terms of DNA sequences?
A. Fungi
B. Animalia
C. Protista
D. All of these are approximately equivalently diverse.
E. Plantae
.
5 points
Question 2
In bacteria, the cell wall is composed mainly of
A. peptidoglycans.
B. proteins.
C. various polysaccharides.
D. glycoproteins.
E. lipids.
.
5 points
Question 3
All but one of the following are false regarding protists. Identify the true statement.
A. Protists do not have the ability to move on their own.
B. Protists are prokaryotic.
C. Protists have cell walls composed mainly of peptidoglycans.
D. All protists are single-celled organisms.
E. Most protists are single-celled organisms; some are multicellular.
.
5 points
Question 4
Most bacteria are
A. microbial predators.
B. photoautotrophs.
C. symbionts.
D. chemoautotrophs.
E. heterotrophs.
.
5 points
Question 5
What term is used to indicate a characteristic that is shared and inherited from a common ancestor?
A.
derived trait
B.
analogous trait
C.
outgroups
D.
homologous trait
E.
cladistic trait
.
5 points
Question 6
Rickettsias belong to which major group of bacteria?
A. Archaea
B. viruses
C. proteobacteria
D. cyanobacteria
E. spirochetes
.
5 points
Question 7
Oxygen built up in the atmosphere approximately 2 billion years ago and
A. could not have occurred without the oxygen coming from outer space.
B. occurred due to carbon dioxide being split by lightning strikes.
C. occurred because aerobic organisms required the oxygen.
D. destroyed ozone forming more oxygen.
E. helped to form the ozone layer that is so important to life today.
.
5 points
Question 8
Endospores form
A. to produce two offspring from every one parental cell.
B. when the environmental conditions are favorable.
C. as a means of genetic recombination.
D. in response to adverse conditions.
E. during binary fission.
.
5 points
Question 9
The Cambrian Explosion provided a wealth of fossil remains for scientists to uncover. Many of the animals from this time period had tough skins or shells. This would
A. be a disadvantage for these organisms and lead to their death and fossil formation.
B. allow the animals to move into different environments easily.
C. protect the animal from osmotic pressure.
D. make these animals more desirable to predators.
E. protect the animal from predators.
.
5 points
Question 10
When taxonomists classify organisms using a phylogenetic approach, they are most concerned with
A. derived traits.
B. ancestral traits.
C. outgroups.
D. cladists.
E. ingroups.
.
5 points
Question 11
Which form of bacterial cells is rod shaped?
A. spirilla
B. bacilli
C. cocci
. .
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